A ray of light travelling in air falls obliquely on the...

A ray of light travelling in air falls obliquely on the surface of a calm pond. It will
(a) go into the water without deviating from its path
(b) deviate away from the normal
(c) deviate towards the normal
(d) turn back on its original path

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Key Concepts

Snell's Law

Snell's Law provides the quantitative relationship for refraction, relating the angle of incidence and the angle of refraction to the indices of refraction of the two media. It is formulated as n? sin?? = n? sin??, where n? and n? are the refractive indices of the originating and refractive media, respectively, and ?? and ?? are the corresponding angles of incidence and refraction. This law is foundational for predicting the behavior of light at interfaces.

Refraction

Refraction is the bending of a wave, such as light, when it passes from one medium to another in which its speed is different. This phenomenon occurs because the change in speed results in a change in the direction of the wave. In optics, refraction is a fundamental concept that explains how light rays alter their path when transitioning between materials like air and water.

Index of Refraction

The index of refraction, often denoted by 'n', is a measure of how much a material slows down the speed of light relative to the speed of light in a vacuum. Materials with a higher index of refraction, such as water compared to air, slow down light more, causing a greater bending towards the normal when light enters the medium. This concept is crucial for understanding and calculating the deviation of light rays during refraction.

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